India's wasted solar energy highlights lagging battery storage - Nikkei Asia
Published December 15, 2025
India's Wasted Solar Energy Highlights Lagging Battery Storage
India has made significant strides in solar energy adoption, yet a substantial portion of this energy is going unused due to inadequate battery storage solutions. As the country aims to meet its ambitious renewable energy targets, the challenge of energy storage has become increasingly apparent, exposing the limitations of current infrastructure.
In 2021, India installed approximately 13.5 gigawatts (GW) of solar power capacity, bringing the total to around 49 GW. This growth has positioned India as one of the leading countries in solar energy production globally. However, the country is grappling with the issue of how to store the excess energy generated during peak sunlight hours, which often leads to wasted potential energy.
According to the Ministry of New and Renewable Energy (MNRE), India’s solar power generation capacity is expected to reach 100 GW by 2022, a goal that will require significant advancements in energy storage technology. The Indian government has recognized the need for battery storage systems as a critical component of its renewable energy strategy, especially as solar energy production is intermittent and heavily reliant on weather conditions.
Currently, the lack of efficient battery storage solutions means that a large portion of solar energy generated is not utilized. Reports indicate that during certain periods, nearly 40% of solar energy produced goes to waste due to insufficient storage capabilities. This inefficiency not only hampers the country's renewable energy goals but also poses challenges for grid stability and reliability.
India’s energy storage market is still in its nascent stages, with limited deployment of large-scale battery systems. The country has predominantly relied on conventional energy sources, such as coal, to meet its energy demands. As a result, the transition to renewable energy, particularly solar, requires a robust storage solution to manage supply and demand effectively.
The government has initiated various programs aimed at promoting research and development in battery technologies. The National Institute of Solar Energy (NISE) has been tasked with exploring innovative storage solutions that can complement solar energy production. Additionally, the MNRE has launched initiatives to encourage private sector investment in energy storage technologies, aiming to attract international players to the Indian market.
One of the most promising technologies under consideration is lithium-ion batteries, which have gained popularity due to their high energy density and decreasing costs. In recent years, prices for lithium-ion batteries have dropped significantly, making them a more viable option for large-scale energy storage. However, challenges remain regarding the supply chain for raw materials and recycling processes, which need to be addressed to ensure sustainability.
In addition to lithium-ion technology, other solutions, such as flow batteries and solid-state batteries, are being explored. Flow batteries, which use liquid electrolytes to store energy, offer longer discharge times and can be scaled up for larger applications. Solid-state batteries, on the other hand, promise higher energy densities and safety benefits compared to conventional lithium-ion batteries.
The Indian government has also recognized the importance of integrating battery storage with renewable energy projects. The Solar Energy Corporation of India (SECI) has been tasked with developing pilot projects that incorporate energy storage systems alongside solar installations. These projects aim to demonstrate the viability of battery storage in enhancing the reliability of solar energy supply.
Despite these efforts, the pace of implementation remains slow. Industry experts stress the need for a comprehensive policy framework that encourages investment in energy storage technologies. This includes incentives for manufacturers, research grants for innovative projects, and regulations that facilitate the deployment of storage systems alongside renewable energy projects.
Furthermore, the integration of battery storage with smart grid technologies is essential for optimizing energy management. Smart grids can enhance the efficiency of energy distribution, allowing for better coordination between energy supply and demand. By leveraging data analytics and real-time monitoring, grid operators can optimize the use of stored energy during peak demand periods, reducing reliance on fossil fuel-based power generation.
As India continues to expand its solar energy capacity, addressing the issue of energy storage will be critical to achieving its renewable energy targets. The country aims to generate 50% of its total energy needs from non-fossil fuel sources by 2030. This ambitious goal underscores the urgency of developing effective battery storage solutions that can complement solar energy production and ensure a stable energy supply.
In conclusion, while India has made remarkable progress in solar energy adoption, the challenge of energy storage remains a significant barrier to maximizing the potential of its renewable energy resources. As the country works towards improving its battery storage capabilities, collaboration between government, industry, and research institutions will be essential in driving innovation and investment in this critical area. The future of India’s renewable energy landscape will depend on the successful integration of energy storage solutions that can harness the full potential of solar power.